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    • 4. 发明授权
    • Industrial cooling tower fan blade having abrasion resistant leading edge
    • 工业冷却风扇叶片,具有抗磨损的导线边缘
    • US5123814A
    • 1992-06-23
    • US558770
    • 1990-07-27
    • Larry F. BurdickScott E. Mayes
    • Larry F. BurdickScott E. Mayes
    • F04D29/38
    • F04D29/388F05D2240/303Y10T29/49327Y10T29/49337
    • An elongated, flexible protective urethane member is bonded and firmly affixed to the leading edge of a glass fiber reinforced polyester skin fan blade for large diameter industrial water cooling tower fans. The polyester blade without such protective member would be subject to leading edge abrasion and deterioration during use. The flexible protective member is applied to the blade prior to curing of the chemically thickened polyester skin. Firm bonding and adherence of the protective member to the leading edge of the blade skin is obtained by curing of the skin with the protective member in place over the leading edge of the blade. Mechanical connection of the urethane member to the polyeste blade body is accomplished by provision of a series of holes along opposed longitudinal margins of the member which allow fluid polyester resin to flow into such openings during cure of the blade body resin layers, and by application of a glass fiber reinforced synthetic resin hold-down strip over opposed longitudinally extending edges of the hold-down strips and adjacent areas of the blade skin. Thus, upon completion of the cure cyle, the polyester resin within the openings cross-links with the underlying resin material and the overlying hold-down strips to more securely lock the member to the blade body.
    • 一个细长的,柔性的保护性聚氨酯构件被粘合并牢固地固定在用于大直径工业水冷却塔风扇的玻璃纤维增​​强聚酯皮革风扇叶片的前缘。 没有这种保护构件的聚酯刮刀在使用过程中会受到前缘磨损和劣化。 在固化化学增稠的聚酯皮肤之前,将柔性保护构件施加到刀片上。 通过将保护部件固定在叶片的前缘上的适当位置,可以将保护部件固定在叶片皮肤前缘上。 聚氨酯构件与多孔体叶片体的机械连接是通过在构件的相对纵向边缘处设置一系列孔来实现的,这些孔允许流体聚酯树脂在叶片本体树脂层固化期间流入这种开口,并且通过施加 玻璃纤维增​​强的合成树脂压紧带在压紧条的相对纵向延伸的边缘和叶片皮肤的相邻区域上。 因此,在完成固化树脂后,开口内的聚酯树脂与下面的树脂材料和上覆的压紧带交叉连接,以更牢固地将构件锁定到叶片体上。
    • 5. 发明授权
    • Plastic fan blade for industrial cooling towers and method of making same
    • 用于工业冷却塔的塑料风扇叶片及其制造方法
    • US5096384A
    • 1992-03-17
    • US558710
    • 1990-07-27
    • William F. ImmellLarry F. BurdickScott E. MayesHarry J. Bendick
    • William F. ImmellLarry F. BurdickScott E. MayesHarry J. Bendick
    • B64C11/20B29C70/34B29C70/86B29D99/00B64C11/26F04D29/02F04D29/38
    • B29D99/0025B29C70/345B29C70/865B64C11/26F04D29/388B29L2031/08Y10T29/49332Y10T29/49337
    • A molded, composite, airfoil-defining, synthetic resin blade for large diameter cooling tower fans is disclosed wherein a moderately dense synthetic resin foam core is first formed that is generally of the same size and shape as the final desired blade. A shank embedded in the foam core extends outwardly from the end of the blade that is adapted to be fastened to the fan hub. A skin of fiberglass reinforced synthetic resin material is placed over the foam core with the thickness of the skin being greatest at the hub end of the blade and especially around the shank. The foam core with the skin thereon is molded into the final desired configuration thereof under pressure and temperature conditions such that the core is compressed and the thickness reduced to an extent correlated with the thickness of the synthetic resin skin on opposite faces thereof. Compression of the core enhances conversion of the fiberglass reinforced synthetic resin layers into a laminar monolithic skin by virtue of curing of the synthetic resin skin between the compressed core and the mold. The core is provided with stepped areas on opposite sides of the core which increase in height in a direction away from the shank. A sufficient number of pre-prepared, flexible sheets of fiberglass reinforced resin material are placed over the stepped areas to substantially fill the space between the mold and said stepped areas of the core during curing of the resin.
    • 公开了一种用于大直径冷却塔风扇的模制的,复合的,翼型限定的合成树脂叶片,其中首先形成中等密度的合成树脂泡沫芯,其通常与最终期望的叶片具有相同的尺寸和形状。 嵌入在泡沫芯中的柄从叶片的端部向外延伸,其适于紧固到风扇毂。 将玻璃纤维增​​强合成树脂材料的皮肤放置在泡沫芯上,其中皮肤的厚度在叶片的轮毂端处尤其是在柄部周围是最大的。 其上具有皮肤的泡沫芯在压力和温度条件下被模制成最终期望的构型,使得芯被压缩并且厚度减小到与其相对面上的合成树脂皮的厚度相关的程度。 核心的压缩通过固化压缩芯和模具之间的合成树脂皮肤,增强了玻璃纤维增​​强合成树脂层的转化为层状整体表皮。 芯部在芯部的相对侧上设置有阶梯区域,其在远离柄部的方向上增加高度。 在树脂固化期间,足够数量的预先制备好的玻璃纤维增​​强树脂材料的柔性片放置在台阶区域上,以基本上填充模具与芯的所述台阶区域之间的空间。